Hello Daniela,
I see it's been a while since you started this discussion. I am not sure if you are still looking for a channel manager (PMS)
I've been using Smoobu for more than 2 years. I manage 50+ properties using Smoobu.
Overall I am satisfied. As a client, I wish it had more features than it already has, but I think performance of Smoobu stands out when you consider the cost.
From your requirements, I only noted that the following cannot be met by Smoobu:
- to be able to post/update a listing at the same time in different platforms
Truthfully, I am not aware of any CM/PMS that can do this task.
I tried Guesty, but the price drove me away from it.
In my opinion, best alternative to Smoobu would be IGMS. It is pricey, though.
Best Regards,
Ahmet